Sand-drier



(No Model'.) LA MOTTEC. ATWOOD.

SAND DRIER.

Patented Feb. 19. 1895.

/NVENTOH A77'0HNEYS.

' vUlvrrnn STATES PATENT Ormes.

` LA MOTTE C. ATWOOD, 'OF ST. LOUIS, ASSIGNOR TO ROBERT H. LEWIS, SECRETARY AND TREASURER OF THE TAVERN -ROCK SAND COMPANY,

OF BECKER, MISSOURI.

SAND-Dalian.

SPECIFICATION forming part of Letters Patent N o. 534,491, dated February 19, 1895.

' Application sied August 21,1894. serinnazasga (Nomaden To @ZZ .whom it may concern.-

Beit known that I, LA MOTTE C. ATWOOD, of St. Louis,k Missouri, have invented a new and Improved Sand-Drier, of which the following 1s a full, clear, and exact description.

My invention relates to improvements in sand drying machines, although vthe machine may be used for drying other loose material; and the object of my invention is to produce an extremely simplemachine which may be economically operated, which is adapted to cause alarge quantity of sand to flow rapidly through it and be subjected to the drying process, and which also has an extremely simple means of forcing a current of hot air through the machine, all to the end that the sand may be rapidly and cheaply dried. y

A further object ot' myinvention is to provide a very simple and easily operated meansl of regulating the flow of sand, so that its rate of travel through the machine may be proportioned to its degree of wetness and to the temperature of the air which is forced through it.

To these ends my invention consists of certain features of construction and combinations of parts, which will be hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forminga part of this specification,

in which similar fgurestof reference indicate corresponding parts in 'all the views.'

Figure lis alongitudinal section on the line 1-1 of Fig. 2, of the' sand drying machine cmbodying my invention. Fig. 2 is a cross section on the line 2-2 of Fig. l; and Fig. 3 is a longitudinal section of a vslightly modified form of drying cylinder for the machine.

The machine is provided with an elongated cylinder 10 which turns horizontally, having external bands or tracks 11 running on pulleys 12 which are journaled in suitable supports 13, and the cylinder is provided with an external gear wheel let which meshes with and is driven by a gear wheel 15, see Fig. 2, on a driving shaft 16, and the latter may be turned in any convenient way. The pulleys 12 are grooved in their peripheries as seen in Fig. 1 so as to hold the cylinder` 10 .against longitudinal movement whereby the gears 14 and 15 may be disengaged.

, The above arrangement is a very sim ple way f driving the cylinder, but it will ofcourse be understood that any suitable means may be used for revolvingit, without affecting the principle of the machine.

The receiving end of the cylinder is conneeted with a hot air pipe 17 which is stationary and has a head 17b provided with a flange 17a which takes in the open end of the cylinder 10, and the air pipe receives its supply of hot air from a furnace 18 which maybe of any usual kind, but which is preferably a petroleum furnace, as illustrated, because such a furnace can be very cheaply and easily run.

At the discharge or open end of the cylinder 10 is an exhaust fan 19, which also may be of any usual kind, and this causes theI air valso serves to draw out the ,moisture as fast as it is freed from the-sand, thus greatly promoting the drying process.

The sand is delivered to the cylinder through a hopper and spout 20, which discharges into the end of the cylinder next the air pipe 17. The cylinder is provided with a series of parallel flanges 21 so that as it revolves the sand is carried to the top of the cylinder and then dropped from the flanges so as to fall vertically, or substantially so, and it is, in its downward movement, caught by the deilectors'22 which are in the shape of parallel plates pivoted to a bar 23, one end ofv which is mounted in the standard 26y while the other end is secured at 23,a to the air pipe 17 and serves to brace the same. Byplacing these detlectors at an inclination, as shown in Fig. 1, the sand, which is dropped upon them,

is carried forward toward the open end of the cylinder and is in this waydischarged. The ends of the flanges 21 are undercut. as seen at 21a, Fig. 1 to receive the dange 17 a on head 17b and strengthen the joint between the-head and cylinder. The rate at which the sand is carried forward depends upon the inclination of the deectors, and lthis is regulated by a rod 24 which connects with them all and extends from the open end of the cylinder through a suitable binding box 25 which is carried by a post or support 26, this, as illustrated, serving also as a support for the, fan. The post 26 also supports one end ot' the bar 23, the other end being secured to the pipe 17, but it may be supported in any suitable and convenient manner.

It will be observed that the furnace and fan cause a constant stream of hotair to travel rapidly through the cylinder, so that the sand, by means ofthe flanges and deilectors, is kept constantly in the air, that the freed moisture passes out in the Way of vapor, and consequently that the machine Works very rapidly.

In Fig. 3 I have shown a modification ofthe machine which enables the central deflectors to be dispensed with, and to this end flanges 2l are used, which are like the flanges 21, except that they are placed spirally instead of straigh tin the cylinder, and hence, when the cylinder is revolved the spiral flanges act like a screw and cause the sand to be carried toward the discharge end ot' the cylinder,

Where it is delivered as in Fig. l, on a suitable chute 27 or may be delivered to a carrier or other receptacle;

Having thus described my invention, claim as nevkT and desire to secure by Letters Patent- The combination of a revoluble cylinder having an open end and provided with inter nal flanges, a hot air furnace, a pipe leading therefrom to the open end of the cylinder, a head on said pipe having a flange fitting in the vsaid open end of the cylinder, the exhaust fan and a standard at the opposite end of the cylinder, a bar extending through the cylinder and connected at one end to said standard and at Vits other end to the air-pipe, and deflectors adjustably hung on said bar, substantially as set forth.

LA MOTTE C. ATWOOD.

Witnesses:

C. SEGWICK, F. W. HANAFORD. 

